/// <summary>
/// Initializes the provider by pulling the config info from the web.config and validate/create the DynamoDB table.
/// If the table is being created this method will block until the table is active.
/// </summary>
/// <param name="name"></param>
/// <param name="config"></param>
public override void Initialize(string name, NameValueCollection config)
{
if (config == null)
{
throw new ArgumentNullException("config");
}
base.Initialize(name, config);
GetConfigSettings(config);
var region = RegionEndpoint.GetBySystemName(this._regionName);
if (!string.IsNullOrEmpty(this._accessKey))
{
this._ddbClient = new AmazonDynamoDBClient(this._accessKey, this._secretKey, region);
}
else
{
this._ddbClient = new AmazonDynamoDBClient(region);
}
SetupTable();
}
protected override void OnCreate(Bundle bundle)
{
base.OnCreate (bundle);
// Set our view from the "main" layout resource
SetContentView (Android.Resource.Layout.Main);
// Get our button from the layout resource,
// and attach an event to it
Button button = FindViewById<Button> (Android.Resource.Id.myButton);
button.Click += delegate {
Console.WriteLine();
Console.WriteLine("Setting up DynamoDB client");
client = new AmazonDynamoDBClient(RegionEndpoint.USWest2);
Console.WriteLine();
Console.WriteLine("Creating sample tables");
CreateSampleTables();
Console.WriteLine();
Console.WriteLine("Running DataModel sample");
RunDataModelSample();
Console.WriteLine();
Console.WriteLine("Running DataModel sample");
RunDocumentModelSample();
Console.WriteLine();
Console.WriteLine("Removing sample tables");
DeleteSampleTables();
Console.WriteLine();
};
}
public static void Main(string[] args)
{
Console.WriteLine();
Console.WriteLine("Setting up DynamoDB client");
client = new AmazonDynamoDBClient(RegionEndpoint.USWest2);
Console.WriteLine();
Console.WriteLine("Creating sample tables");
CreateSampleTables();
Console.WriteLine();
Console.WriteLine("Running DataModel sample");
RunDataModelSample();
Console.WriteLine();
Console.WriteLine("Running DataModel sample");
RunDocumentModelSample();
Console.WriteLine();
Console.WriteLine("Removing sample tables");
DeleteSampleTables();
Console.WriteLine();
Console.WriteLine("Press Enter to continue...");
Console.Read();
}
/// <summary>
/// A utility method for cleaning up expired sessions that IIS failed to delete. The method performs a scan on the table
/// with a condition that the expiration date is in the past and calls delete on all the keys returned. Scans can be costly on performance
/// so use this method sparingly like a nightly or weekly clean job.
/// </summary>
/// <param name="dbClient">The AmazonDynamoDB client used to find a delete expired sessions.</param>
/// <param name="tableName">The table to search.</param>
public static void DeleteExpiredSessions(AmazonDynamoDB dbClient, string tableName)
{
Table table = Table.LoadTable(dbClient, tableName, Table.DynamoDBConsumer.SessionStateProvider);
ScanFilter filter = new ScanFilter();
filter.AddCondition(ATTRIBUTE_EXPIRES, ScanOperator.LessThan, DateTime.Now);
ScanOperationConfig config = new ScanOperationConfig();
config.AttributesToGet = new List <string>();
config.AttributesToGet.Add(ATTRIBUTE_SESSION_ID);
config.Filter = filter;
Search search = table.Scan(config);
do
{
List <Document> page = search.GetNextSet();
foreach (var document in page)
{
table.DeleteItem(document);
}
} while (!search.IsDone);
}
private Table(AmazonDynamoDB ddbClient, string tableName, Table.DynamoDBConsumer consumer)
{
DDBClient = ddbClient;
TableConsumer = consumer;
TableName = tableName;
HashKeyIsNumeric = RangeKeyIsDefined = RangeKeyIsNumeric = false;
}
/// <summary>
/// A utility method for cleaning up expired sessions that IIS failed to delete. The method performs a scan on the table
/// with a condition that the expiration date is in the past and calls delete on all the keys returned. Scans can be costly on performance
/// so use this method sparingly like a nightly or weekly clean job.
/// </summary>
/// <param name="dbClient">The AmazonDynamoDB client used to find a delete expired sessions.</param>
/// <param name="tableName">The table to search.</param>
public static void DeleteExpiredSessions(AmazonDynamoDB dbClient, string tableName)
{
Table table = Table.LoadTable(dbClient, tableName, Table.DynamoDBConsumer.SessionStateProvider);
ScanFilter filter = new ScanFilter();
filter.AddCondition(ATTRIBUTE_EXPIRES, ScanOperator.LessThan, DateTime.Now);
ScanOperationConfig config = new ScanOperationConfig();
config.AttributesToGet = new List <string> {
ATTRIBUTE_SESSION_ID
};
config.Select = SelectValues.SpecificAttributes;
config.Filter = filter;
DocumentBatchWrite batchWrite = table.CreateBatchWrite();
Search search = table.Scan(config);
do
{
List <Document> page = search.GetNextSet();
foreach (var document in page)
{
batchWrite.AddItemToDelete(document);
}
} while (!search.IsDone);
batchWrite.Execute();
}
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
// Set our view from the "main" layout resource
SetContentView(Android.Resource.Layout.Main);
// Get our button from the layout resource,
// and attach an event to it
Button button = FindViewById <Button> (Android.Resource.Id.myButton);
button.Click += delegate {
Console.WriteLine();
Console.WriteLine("Setting up DynamoDB client");
client = new AmazonDynamoDBClient(RegionEndpoint.USWest2);
Console.WriteLine();
Console.WriteLine("Creating sample tables");
CreateSampleTables();
Console.WriteLine();
Console.WriteLine("Running DataModel sample");
RunDataModelSample();
Console.WriteLine();
Console.WriteLine("Running DataModel sample");
RunDocumentModelSample();
Console.WriteLine();
Console.WriteLine("Removing sample tables");
DeleteSampleTables();
Console.WriteLine();
};
}
private Table(AmazonDynamoDB ddbClient, string tableName, Table.DynamoDBConsumer consumer)
{
DDBClient = ddbClient;
TableConsumer = consumer;
TableName = tableName;
RangeKeyIsDefined = false;
HashKeyType = DynamoDBEntryType.String;
RangeKeyType = DynamoDBEntryType.String;
}
private void CallUntilCompletion(BatchWriteItemRequest request, AmazonDynamoDB client)
{
do
{
var batchWriteItemResponse = client.BatchWriteItem(request);
var result = batchWriteItemResponse.BatchWriteItemResult;
request.RequestItems = result.UnprocessedItems;
} while (request.RequestItems.Count > 0);
}
private Table(AmazonDynamoDB ddbClient, string tableName, Table.DynamoDBConsumer consumer)
{
DDBClient = ddbClient;
TableConsumer = consumer;
TableName = tableName;
Keys = new Dictionary<string, KeyDescription>();
HashKeys = new List<string>();
RangeKeys = new List<string>();
LocalSecondaryIndexes = new Dictionary<string, LocalSecondaryIndexDescription>();
LocalSecondaryIndexNames = new List<string>();
Attributes = new List<AttributeDefinition>();
}
/// <summary>
/// A utility method for cleaning up expired sessions that IIS failed to delete. The method performs a scan on the table
/// with a condition that the expiration date is in the past and calls delete on all the keys returned. Scans can be costly on performance
/// so use this method sparingly like a nightly or weekly clean job.
/// </summary>
/// <param name="dbClient">The AmazonDynamoDB client used to find a delete expired sessions.</param>
/// <param name="tableName">The table to search.</param>
public static void DeleteExpiredSessions(AmazonDynamoDB dbClient, string tableName)
{
Table table = Table.LoadTable(dbClient, tableName, Table.DynamoDBConsumer.SessionStateProvider);
ScanFilter filter = new ScanFilter();
filter.AddCondition(ATTRIBUTE_EXPIRES, ScanOperator.LessThan, DateTime.Now);
ScanOperationConfig config = new ScanOperationConfig();
config.AttributesToGet = new List<string>();
config.AttributesToGet.Add(ATTRIBUTE_SESSION_ID);
config.Filter = filter;
Search search = table.Scan(config);
do
{
List<Document> page = search.GetNextSet();
foreach (var document in page)
{
table.DeleteItem(document);
}
} while (!search.IsDone);
}
/// <summary>
/// A utility method for cleaning up expired sessions that IIS failed to delete. The method performs a scan on the ASP.NET_SessionState table
/// with a condition that the expiration date is in the past and calls delete on all the keys returned. Scans can be costly on performance
/// so use this method sparingly like a nightly or weekly clean job.
/// </summary>
/// <param name="dbClient">The AmazonDynamoDB client used to find a delete expired sessions.</param>
public static void DeleteExpiredSessions(AmazonDynamoDB dbClient)
{
DeleteExpiredSessions(dbClient, DEFAULT_TABLENAME);
}
/// <summary>
/// Constructor for testing.
/// </summary>
/// <param name="ddbClient"></param>
public DynamoDBSessionStateStore(AmazonDynamoDB ddbClient)
{
this._ddbClient = ddbClient;
SetupTable();
}
/// <summary>
/// Creates a Table object with the specified name, using the
/// passed-in client to load the table definition.
///
/// This method will throw an exception if the table does not exist.
/// </summary>
/// <param name="ddbClient">Client to use to access DynamoDB.</param>
/// <param name="tableName">Name of the table.</param>
/// <returns>Table object representing the specified table.</returns>
public static Table LoadTable(AmazonDynamoDB ddbClient, string tableName)
{
Table table = new Table(ddbClient, tableName, Table.DynamoDBConsumer.DocumentModel);
table.GetKeyInfo();
return table;
}
private void sendDynamoMachineName()
{
//Image image = Image.FromFile(raw.Text);
//System.Drawing.Imaging.ImageFormat format = image.RawFormat;
//string picture = ImageToBase64(image, format);
string[] SampleTables = new string[] { "Computer", "Index", "Images" };
Console.WriteLine("Getting list of tables");
List<string> currentTables = client.ListTables().ListTablesResult.TableNames;
Console.WriteLine("Number of tables: " + currentTables.Count);
client = new AmazonDynamoDBClient(RegionEndpoint.USWest2);
bool tablesAdded = false;
if (!currentTables.Contains("Computer"))
{
Console.WriteLine("Computer table does not exist, creating");
client.CreateTable(new CreateTableRequest
{
TableName = "Computer",
ProvisionedThroughput = new ProvisionedThroughput { ReadCapacityUnits = 10, WriteCapacityUnits = 10 },
KeySchema = new KeySchema
{
HashKeyElement = new KeySchemaElement { AttributeName = "compID", AttributeType = "S" },
}
});
tablesAdded = true;
}
//if (!currentTables.Contains("Index"))
//{
// Console.WriteLine("Index table does not exist, creating");
// client.CreateTable(new CreateTableRequest
// {
// TableName = "Index",
// ProvisionedThroughput = new ProvisionedThroughput { ReadCapacityUnits = 10, WriteCapacityUnits = 10 },
// KeySchema = new KeySchema
// {
// HashKeyElement = new KeySchemaElement { AttributeName = "indexID", AttributeType = "S" }
// }
// });
// tablesAdded = true;
//}
//if (!currentTables.Contains("Images"))
//{
// Console.WriteLine("Images table does not exist, creating");
// client.CreateTable(new CreateTableRequest
// {
// TableName = "Images",
// ProvisionedThroughput = new ProvisionedThroughput { ReadCapacityUnits = 10, WriteCapacityUnits = 10 },
// KeySchema = new KeySchema
// {
// HashKeyElement = new KeySchemaElement { AttributeName = "imgeID", AttributeType = "S" },
// }
// });
// tablesAdded = true;
//}
if (tablesAdded)
{
while (true)
{
bool allActive = true;
foreach (var table in SampleTables)
{
string tableStatus = GetTableStatus(table);
bool isTableActive = string.Equals(tableStatus, "ACTIVE", StringComparison.OrdinalIgnoreCase);
if (!isTableActive)
allActive = false;
}
if (allActive)
{
Console.WriteLine("All tables are ACTIVE");
break;
}
}
}
//Console.WriteLine("All sample tables created");
//Console.WriteLine("Creating the context object");
DynamoDBContext context = new DynamoDBContext(client);
//Console.WriteLine("Creating actors");
Computer newcomputer = new Computer
{
compID1 = compID,
compName1 = machineName
};
//Index newIndex = new Index
//{
// indexID1 = indexID.Text,
// compID2 = CompID.Text,
// XMLProfile1 = XML.Text
//};
//Images newImage = new Images
//{
// imgID1 = ImgID.Text,
// indexID1 = indexID.Text,
// extension1 = Extension.Text,
// location1 = Location.Text,
// raw1 = picture
//};
}
/// <summary>
/// Creates a Table object with the specified name, using the
/// passed-in client to load the table definition.
///
/// This method will throw an exception if the table does not exist.
/// </summary>
/// <param name="ddbClient">Client to use to access DynamoDB.</param>
/// <param name="tableName">Name of the table.</param>
/// <returns>Table object representing the specified table.</returns>
public static Table LoadTable(AmazonDynamoDB ddbClient, string tableName)
{
return LoadTable(ddbClient, tableName, DynamoDBConsumer.DocumentModel);
}
/// <summary>
/// A utility method for cleaning up expired sessions that IIS failed to delete. The method performs a scan on the table
/// with a condition that the expiration date is in the past and calls delete on all the keys returned. Scans can be costly on performance
/// so use this method sparingly like a nightly or weekly clean job.
/// </summary>
/// <param name="dbClient">The AmazonDynamoDB client used to find a delete expired sessions.</param>
/// <param name="tableName">The table to search.</param>
public static void DeleteExpiredSessions(AmazonDynamoDB dbClient, string tableName)
{
Table table = Table.LoadTable(dbClient, tableName, Table.DynamoDBConsumer.SessionStateProvider);
ScanFilter filter = new ScanFilter();
filter.AddCondition(ATTRIBUTE_EXPIRES, ScanOperator.LessThan, DateTime.Now);
ScanOperationConfig config = new ScanOperationConfig();
config.AttributesToGet = new List<string> { ATTRIBUTE_SESSION_ID };
config.Select = SelectValues.SpecificAttributes;
config.Filter = filter;
DocumentBatchWrite batchWrite = table.CreateBatchWrite();
Search search = table.Scan(config);
do
{
List<Document> page = search.GetNextSet();
foreach (var document in page)
{
batchWrite.AddItemToDelete(document);
}
} while (!search.IsDone);
batchWrite.Execute();
}
/// <summary>
/// Initializes the provider by pulling the config info from the web.config and validate/create the DynamoDB table.
/// If the table is being created this method will block until the table is active.
/// </summary>
/// <param name="name"></param>
/// <param name="config"></param>
public override void Initialize(string name, NameValueCollection config)
{
if (config == null)
throw new ArgumentNullException("config");
base.Initialize(name, config);
GetConfigSettings(config);
var region = RegionEndpoint.GetBySystemName(this._regionName);
if (!string.IsNullOrEmpty(this._accessKey))
{
this._ddbClient = new AmazonDynamoDBClient(this._accessKey, this._secretKey, region);
}
else
{
this._ddbClient = new AmazonDynamoDBClient(region);
}
SetupTable();
}
/// <summary>
/// Constructor for testing.
/// </summary>
/// <param name="ddbClient"></param>
public DynamoDBSessionStateStore(AmazonDynamoDB ddbClient)
{
this._ddbClient = ddbClient;
SetupTable();
}
private void sendDynamoMachineName()
{
//Image image = Image.FromFile(raw.Text);
//System.Drawing.Imaging.ImageFormat format = image.RawFormat;
//string picture = ImageToBase64(image, format);
string[] SampleTables = new string[] { "Computer", "Index", "Images" };
Console.WriteLine("Getting list of tables");
List <string> currentTables = client.ListTables().ListTablesResult.TableNames;
Console.WriteLine("Number of tables: " + currentTables.Count);
client = new AmazonDynamoDBClient(RegionEndpoint.USWest2);
bool tablesAdded = false;
if (!currentTables.Contains("Computer"))
{
Console.WriteLine("Computer table does not exist, creating");
client.CreateTable(new CreateTableRequest
{
TableName = "Computer",
ProvisionedThroughput = new ProvisionedThroughput {
ReadCapacityUnits = 10, WriteCapacityUnits = 10
},
KeySchema = new KeySchema
{
HashKeyElement = new KeySchemaElement {
AttributeName = "compID", AttributeType = "S"
},
}
});
tablesAdded = true;
}
//if (!currentTables.Contains("Index"))
//{
// Console.WriteLine("Index table does not exist, creating");
// client.CreateTable(new CreateTableRequest
// {
// TableName = "Index",
// ProvisionedThroughput = new ProvisionedThroughput { ReadCapacityUnits = 10, WriteCapacityUnits = 10 },
// KeySchema = new KeySchema
// {
// HashKeyElement = new KeySchemaElement { AttributeName = "indexID", AttributeType = "S" }
// }
// });
// tablesAdded = true;
//}
//if (!currentTables.Contains("Images"))
//{
// Console.WriteLine("Images table does not exist, creating");
// client.CreateTable(new CreateTableRequest
// {
// TableName = "Images",
// ProvisionedThroughput = new ProvisionedThroughput { ReadCapacityUnits = 10, WriteCapacityUnits = 10 },
// KeySchema = new KeySchema
// {
// HashKeyElement = new KeySchemaElement { AttributeName = "imgeID", AttributeType = "S" },
// }
// });
// tablesAdded = true;
//}
if (tablesAdded)
{
while (true)
{
bool allActive = true;
foreach (var table in SampleTables)
{
string tableStatus = GetTableStatus(table);
bool isTableActive = string.Equals(tableStatus, "ACTIVE", StringComparison.OrdinalIgnoreCase);
if (!isTableActive)
{
allActive = false;
}
}
if (allActive)
{
Console.WriteLine("All tables are ACTIVE");
break;
}
}
}
//Console.WriteLine("All sample tables created");
//Console.WriteLine("Creating the context object");
DynamoDBContext context = new DynamoDBContext(client);
//Console.WriteLine("Creating actors");
Computer newcomputer = new Computer
{
compID1 = compID,
compName1 = machineName
};
//Index newIndex = new Index
//{
// indexID1 = indexID.Text,
// compID2 = CompID.Text,
// XMLProfile1 = XML.Text
//};
//Images newImage = new Images
//{
// imgID1 = ImgID.Text,
// indexID1 = indexID.Text,
// extension1 = Extension.Text,
// location1 = Location.Text,
// raw1 = picture
//};
}
/// <summary>
/// Creates a Table object with the specified name, using the
/// passed-in client to load the table definition.
///
/// This method will return false if the table does not exist.
/// </summary>
/// <param name="ddbClient">Client to use to access DynamoDB.</param>
/// <param name="tableName">Name of the table.</param>
/// <param name="table">Loaded table.</param>
/// <returns>
/// True if table was successfully loaded; otherwise false.
/// </returns>
public static bool TryLoadTable(AmazonDynamoDB ddbClient, string tableName, out Table table)
{
try
{
table = LoadTable(ddbClient, tableName);
return true;
}
catch
{
table = null;
return false;
}
}
/// <summary>
/// A utility method for cleaning up expired sessions that IIS failed to delete. The method performs a scan on the ASP.NET_SessionState table
/// with a condition that the expiration date is in the past and calls delete on all the keys returned. Scans can be costly on performance
/// so use this method sparingly like a nightly or weekly clean job.
/// </summary>
/// <param name="dbClient">The AmazonDynamoDB client used to find a delete expired sessions.</param>
public static void DeleteExpiredSessions(AmazonDynamoDB dbClient)
{
DeleteExpiredSessions(dbClient, DEFAULT_TABLENAME);
}
internal static Table LoadTable(AmazonDynamoDB ddbClient, string tableName, Table.DynamoDBConsumer consumer)
{
Table table = new Table(ddbClient, tableName, consumer);
table.GetKeyInfo();
return table;
}
private void CallUntilCompletion(BatchWriteItemRequest request, Dictionary <Key, Document> documentMap, AmazonDynamoDB client)
{
do
{
var batchWriteItemResponse = client.BatchWriteItem(request);
var result = batchWriteItemResponse.BatchWriteItemResult;
request.RequestItems = result.UnprocessedItems;
Dictionary <Key, Document> unprocessedDocuments = new Dictionary <Key, Document>(keyComparer);
foreach (var unprocessedItems in result.UnprocessedItems)
{
Table table = tableMap[unprocessedItems.Key];
foreach (var writeRequest in unprocessedItems.Value)
{
if (writeRequest.PutRequest != null)
{
var key = table.MakeKey(Document.FromAttributeMap(writeRequest.PutRequest.Item));
Document document = null;
if (documentMap.TryGetValue(key, out document))
{
// Remove unprocessed requests from the document map
// and copy them to unprocessed documents.
unprocessedDocuments.Add(key, document);
documentMap.Remove(key);
}
}
}
}
// Commit the remaining documents in the document map
foreach (var document in documentMap.Values)
{
document.CommitChanges();
}
documentMap = unprocessedDocuments;
} while (request.RequestItems.Count > 0);
// Commit any remaining documents in document map.
// This would only happen if we are not able to match the items sent in the request
// with the items returned back as unprocessed items.
foreach (var document in documentMap.Values)
{
document.CommitChanges();
}
}
